diff --git a/core-writer/external/bitshuffle/bitshuffle_internals.h b/core-writer/external/bitshuffle/bitshuffle_internals.h
index 8dbf872..7e9810e 100644
--- a/core-writer/external/bitshuffle/bitshuffle_internals.h
+++ b/core-writer/external/bitshuffle/bitshuffle_internals.h
@@ -25,7 +25,7 @@
 //  typedef long long           int64_t;
 //#endif
 
-#include <c++/9/stdlib.h>
+#include <stdlib.h>
 #include "iochain.h"